#include<iostream>
#include<stdlib.h>
using namespace std;

namespace NSP{
    int a = 6;
    struct Student{
        char name[20];
        int age;
    };
}


int main()
{   
    cout << "a = " << NSP::a << endl;
    // cout << "------" << endl;
    using namespace NSP;
    Student zhang;
    zhang.age = 18;
    cout << "学生的年龄：" << zhang.age << endl;
}


